Improvement in wrenches



T. F. DUNN.

Wrenches.

Patented Aug. 10, 1875.,

s E s s E N h W ATTURN S.

NJEIERS. PMOTO LrIHOGRAPHER, WASHINGTON. u C.

PATENT rrro THOMAS F. DUNN, OF SAOGARAPPA, MAINE.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 166,5 1 1, dated August10, 1875; application filed May 22, 1875.

To all whom it may concern Be it known that I, THOMAS F. DUNN, ofSaccarappa, Cumberland county, Maine, have invented a new and usefulImprovement in Wrenches, of which the following is a specification vThis invention relates to wrenches for turning the nuts of bolts, orturning bolts or screws attached to iron or wood machinery; and itconsists in combining two or more wrenches, by means of a longitudinalslot, in one.

Figure l is a side view of the double wrench, showing the manner ofusing it. Fig. 2 is a longitudinal section of Fig. 1, taken on the linea; 00, showing the slot in the wrench; and Fig. 3 is a perspective viewof one head or end, showing the shoulder and projection, to adapt it tonuts or heads of different sizes.

Similar letters of reference indicate corresponding parts.

A is a straight wrench, which has a longitudinal slot, B. At one or bothends are jaws O O, which are rabbeted on one or more sides and at theend, to show interior shoulders d (l, the rabbeted portion showingrecesses on one side of the wrench and at the end, and projections f, toadapt the jaws to nuts or heads of different sizes.

The slot B allows a wrench of any size (which has one end made thin, soas to be passed through the slot) to be used as represented in thedrawing.

By this means the leverage on either of the wrenches is materiallyincreased, and when one of the wrenches is placed endwise on the nut,the wrench G, which is passed through the slot, may be used as a handleto obtain leverage, and the same of the larger wrench A when G is thusused.

By placing the'interior wrench as seen in the dotted lines the twowrenches may be made to serve as an S-shaped wrench, to accommodate anyparticular position of the bolts or screws.

' The wrench Gr, when passed through the slot B, works freely, and mayslide anywhere, and be placed in any position, and is prevented fromsliding from the slot by the pin H.

I am aware it is not new to provide the jaws of a wrench withprojections, as shown in the drawing, and do not claim suchconstruction.

Having thus described my invention, Iclaim as new and desire to secureby Letters Pat' ent The wrench provided with a lengthwise slot, B, inits body or handle portion, for the purpose of adapting it to be appliedto another wrench, in the manner specified.

THOMAS F. DUNN.

Witnesses ABRAHAM HONSTQR, HENRY BLATCHFORD.

